Method and device for the 1+1 protection of an optical transmission path
a transmission path and optical transmission technology, applied in the field of optical networking, can solve the problems of increasing the cost of equipment technology at the site of the customer, increasing the cost of servicing active equipment at the site, and requiring time and effort for the terminal node, so as to eliminate the use of active technology
Active Publication Date: 2012-07-03
ADVA OPTICAL NETWORKING SP ZOO
View PDF17 Cites 4 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Benefits of technology
This solution reduces costs and complexity by eliminating active equipment at customer sites, enabling seamless switching between paths without complicated communications, while maintaining operational reliability and flexibility in bidirectional transmission modes.
Problems solved by technology
In the case that a loss of the working path is detected, this equipment can generate a corresponding error signal and transmit this error signal to a network-management system that switches the transmission of the optical signal to the protection path.
A disadvantage in these known transmission paths with 1+1 protection, however, is the time and effort required with regard to the terminal node, i.e., at the site of the customer, for installing active equipment for switching the signal transmission from the working path to the protection path or vice versa.
This is associated with an increase in the costs for the equipment technology at the site of the customer.
In addition, this produces an increase in the costs for servicing the active equipment at the site of the customer.
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0027]FIG. 1 shows an optical transmission path 1 including a first terminal node 3 that is connected to a second terminal node 5 via a working path 7 and via a protection path 9. In each terminal node 3, 5 there is a splitter unit 11 and 13, respectively, whose node-side port is connected to a node control unit 17 and 19, respectively. The node control units 17, 19 comprise, if necessary, a transmitter unit, receiver unit, and optional, additional units for signal processing or conditioning. The two path-side ports of the splitter units 11, 13 are each connected to the relevant end of the working path or the protection path 7, 9. In the protection path 9, a protection-path connection node 15 is provided. The node control units 17, 19 or the terminal nodes 3, 5 can also be connected, as indicated by the relevant arrows, to higher-level units or a downstream or upstream transmission path.
[0028]The embodiment of an optical transmission path 1 according to FIG. 1 relates to a bidirecti...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The present invention encompasses a method for 1+1 protection of an optical transmission path comprising a working path and a protection path that connect a first and second terminal node. In a working mode, an optical transmission signal is transmitted via the working path from the first to the second terminal node. At the second terminal node, the optical transmission signal is split into two optical sub-signals, and one of the optical sub-signals is sent via the protection path to a protection-path connection node as a working-path control signal. In the case of an interruption of the signal transmission via the working path, the protection-path connection node detects the absence of the working-path control signal and switches the system from the working mode to a protection mode in which signal transmission is conducted via a separate protection path.
Description
FIELD OF THE INVENTION[0001]The present invention relates to a method and device for optical networking, and more particularly to a method and device for the 1+1 protection of an optical transmission path.BACKGROUND[0002]In order to increase the operational reliability of an optical transmission path, for example, with respect to the destruction of an optical waveguide connecting the two terminal nodes of the transmission path, it is known to provide a complete replacement path (protection path) for a working path, wherein, in the case of an interruption in the working path, the transmission is switched to the protection path. This case is called 1+1 protection.[0003]For such 1+1 protection, the switching from the working path to the protection path is constructed such that the loss of the optical signal transmission via the working path is detected, and then the transmission is switched within a specified switchover time to the protection path. As the switchover time, for example, ...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(United States)
IPC IPC(8): H04J14/00H04B10/032
CPCH04B10/032H04J14/0287H04J14/0294H04J2203/006
Inventor HINDERTHUR, HENNING
Owner ADVA OPTICAL NETWORKING SP ZOO